8. Don’t overspray. Don’t spray pesticides unless you have a problem. Consider using integrated pest management (IPM), a system that incorporates a variety of pest-control methods, such as administering treatments in accordance with pests’ lifecycles and/or introducing predators of the offending pests. IPM uses minimal amounts of chemicals, and only when absolutely necessary. More information: EPA.gov/pesticides/controlling

9. Test for carbon monoxide. Have all fuel-burning appliances inspected by a qualified technician once a year. Install a carbon-monoxide detector.

10. Look under the surface. Check for asbestos and lead paint in older homes. Leave them undisturbed or have them professionally removed.